ORA-22340: cannot string type "string"."string

admin

ORA-22340: cannot string type"string"."string".Dependent tables must be upgraded
to latest version
Cause: An attempt was made to reset the version, drop oralter a type when the
data in dependent table has not been upgraded to the latest version.
Action: Usethe ALTER TABLE UPGRADE INCLUDING DATA statement to
upgrade the data in the dependent tables then resubmit the statement.